package com.wx.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.wx.core.service.CoreService;
import com.wx.core.service.impl.CoreServiceImpl;
import com.wx.util.SignUtil;


@Controller
@RequestMapping("/weixinCore")
public class WeixinController {

	@Resource(name="coreService")
	private CoreService coreService;
	
	@RequestMapping(method = RequestMethod.GET)
	public void get(HttpServletRequest request, HttpServletResponse response) {
		System.out.println("接受微信服务器发来的消息doGET");
		// 微信加密签名，signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。
		String signature = request.getParameter("signature");
		// 时间戳
		String timestamp = request.getParameter("timestamp");
		// 随机数
		String nonce = request.getParameter("nonce");
		// 随机字符串
		String echostr = request.getParameter("echostr");

		PrintWriter out = null;
		try {
			out = response.getWriter();
			// 通过检验signature对请求进行校验，若校验成功则原样返回echostr，否则接入失败
			if (SignUtil.checkSignature(signature, timestamp, nonce)) {
				out.print(echostr);
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			out.close();
			out = null;
		}
	}

	@RequestMapping(method = RequestMethod.POST)
	public void post(HttpServletRequest request, HttpServletResponse response)  {
		System.out.println("处理微信服务器发来的消息");
		PrintWriter out = null;
		try {
			// 将请求、响应的编码均设置为UTF-8（防止中文乱码）
			request.setCharacterEncoding("UTF-8");
			response.setCharacterEncoding("UTF-8");

			// 调用核心业务类接收消息、处理消息
			String respMessage = coreService.processRequest(request);

			// 响应消息
			out = response.getWriter();
			out.print(respMessage);
			out.close();
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			out.close();
			out = null;
		}
	}

}


